Copeland, Andrea J.; Gong, Hongmian(Copyright 2005 by The University of Chicago. All rights reserved. Original published article: http://www.journals.uchicago.edu/doi/abs/10.1086/502786 . Access to the original article may require subscription and authorized logon ID/password. IUPUI faculty/staff/students please check University Library resources before purchasing an article. Questions on finding the original article via our databases? Ask a librarian: http://www.ulib.iupui.edu/research/askalibrarian ., 2005)

Williams, Clay; Copeland, Andrea J.(Copyright Statement: The magazine publisher is the copyright holder of this article and it is reproduced with permission. Further reproduction of this article in violation of the copyright is prohibited. To contact the publisher: http://www.elsevier.com/ . Original article as posted online in 2007: doi:10.1016/j.resstr.2006.12.014. To locate a document using doi use the following link: http://dx.doi.org/ . Access to the original article may require subscription and authorized logon ID/password., 2005)